refactor(core): add `noSideEffects()` as private export (#38320)

This is to enable the compiler to generate `noSideEffects()` calls. This is a private export, gated by `ɵ`.

PR Close #38320

packages/compiler-cli/src/ngtsc/imports/src/core.ts

@@ -65,6 +65,7 @@ const CORE_SUPPORTED_SYMBOLS = new Map<string, string>([
   ['ɵɵInjectorDef', 'ɵɵInjectorDef'],
   ['ɵɵNgModuleDefWithMeta', 'ɵɵNgModuleDefWithMeta'],
   ['ɵNgModuleFactory', 'NgModuleFactory'],
+  ['ɵnoSideEffects', 'ɵnoSideEffects'],
 ]);
 
 const CORE_MODULE = '@angular/core';

packages/core/src/core_render3_private_export.ts

@@ -292,5 +292,8 @@ export {
   ɵɵsanitizeUrl,
   ɵɵsanitizeUrlOrResourceUrl,
 } from './sanitization/sanitization';
+export {
+  noSideEffects as ɵnoSideEffects,
+} from './util/closure';
 
 // clang-format on

packages/core/src/r3_symbols.ts

@@ -28,6 +28,7 @@ export {ɵɵdefineNgModule} from './render3/definition';
 export {ɵɵFactoryDef} from './render3/interfaces/definition';
 export {setClassMetadata} from './render3/metadata';
 export {NgModuleFactory} from './render3/ng_module_ref';
+export {noSideEffects as ɵnoSideEffects} from './util/closure';